At ButtonMakers.net we carry US Manufactured and US Compatible button machines and pinback button supplies. There are a ton of machines that use metric measurements and are not compatible with button supplies readily available in the US. Even if they are marketed and sold as "2-1/4 inch" button makers, they may actually be "58 mm." These are often not interchangeable. To measure your machine for compatibility, you would measure the pickup die. This is the die on left on most machines. However, if you're not good at reading a ruler or are just unsure, it is best to order samples. You can take a chance and make a big order, but you will have to pay to return it. We will give you up to 3 free samples and free shipping with the coupon code SAMPLES.